evaluate the expression when c = 3. 2 - 7c - 4

Explanation:

Step1: Substitute c = 3 into the expression

$2-7c - 4=2-7\times3 - 4$

Step2: Perform multiplication

$2-7\times3 - 4=2 - 21-4$

Step3: Perform subtraction from left - to - right

$2-21=-19$, then $-19 - 4=-23$

Answer:

$-23$